Definitive hosts: this species infectsa variety of mammals, especially ruminants Site of infection: bile ducts and gall bladder Typical size: 15-30 mm in length Distribution: Worldwide Intermediate host: several species oflymnaeid snails serve as suitable hosts, including Pseudosuccinea columella and Fossaria bulimoides in Kansas. One sporocyst andtwo redial generations occur. Metacercariae: encystment on a variety ofaquatic vegetation

Eggs of Fasciola hepatica
(Digenea, Echinostomatiformes)

Fasciolopsis buski (Giant intestinal fluke)
(Echinostomatiformes)

Definitive hosts: this species infectsswine and humans Site of infection: small intestine Typical size: 20-75 mm in length Distribution: Orient Intermediate host: multiple species ofplanorbid snails serve as suitable hosts. One sporocyst andtwo redial generations occurwithin the snails Metacercariae: encystment on a variety ofaquatic vegetation including water chestnuts, lotus, and bamboo. Other: This parasite has sometimes beentouted as a cause of most cancers. There is no scientific data publishedin reputable, peer-reviewed scientific journals to support thishypothesis. This parasite is confined to the Orient and does not occurnaturally in North America.

Eggs of Schistosoma haematobium
(Digenea, Strigeiformes, Schistosomatidae)

Eggs of Schistosoma japonicum
(Digenea, Strigeiformes, Schistosomatidae)

Eggs of Schistosoma mansoni